The Stovebolt Site Forums The Shop Area Engine Shop more numbers on motor?

I know my engine is a 235 from a '56 (3837004).The other numbers I'm looking at are on the machined block behind the distributor. (FIOI7A)
Any clues as to what these are?
Also the raised bossing are J 11 6 below the machined block I'm assuming are,(Oct.11,56).
Yeah I know,ASSuMe...
Thanks
Jeff

Jeff,

You look to be correct on the block casting code and date casting code. However, maybe someone will comment on the engine serial number:

1956 truck engine serial number codes

1956 car engine serial number codes

J 11 6 is Sep 11, 1956. The letter I was not used because it looks like a 1. F1017A is an engine assembled in Flint on Oct 17. The "A" indicates a 235, standard transmission. REF: Illustrated Parts Catalog.

Joe D.

The serial number comes up as a '57 325, Passneger car w/manual transmission.

I'll get some pics tommorrow and post because it is stamped with
I's(FIOI7A)-EYES-crosses on top and bottom.

Engine serial number changes to Plant/month,date/Type Designation in 1957.
http://chevy.oldcarmanualproject.com/chevyresto/57011.htm

I don't doubt that your 1's look like I's on your engine serial number. But I like this explanation from the camaro site below, "All date codes are 2 digits, always, so if it looks like the letter I it is still the number 1."
http://www.chevy-camaro.com/chevy-camaro-engine-suffix-code-help.asp

Some references list the block casting number 3837004 as 55-57.
http://clubs.hemmings.com/clubsites/chevytalk/GMhistory/cast.html

Your engine serial number uses 1957-69 form, as 1962C10 (Joe) and Bill have indicated above.

I agree with the others, a 57' assembled at the Flint plant on Oct 17.

So,if the casting on the inside of the block is '56, the casting code would be late '56 for '57 model year?
http://i913.photobucket.com/albums/ac339/Lilbro60/005.jpg
Took this today,are we identifing this stamped area?

PapaJ,

What do you mean when you say "the casting on the inside of the block is '56.

Are referring to the date code casting?
If so, yes, your block was cast in late 1956 and those blocks were used in 1957 vehicles. If the date code letter is I, J, K, L (Sept thur Dec) the engine would be placed in the next year vehicle.

The stamped pad area is identified in the first line of Randy's posting. The second line with the web site explains it even further. And your eyes "I" are ones "1" which is the month and day.

Block casting 3837004 was used in:
Trucks 1955.2 - 1957 w/ mechanical cam
Passenger 1955 - 1957 w/ hydraulic cam

I have the same block with date code K 3 55. Except the stamped info on the pad has a seven digit serial number and then T56Z. It's a late 1955 block that was used in a 1956 vehicle. This also confirms what Randy said that in 1957 the stamped pad info was changed to plant, month and year and type.

Hope this helps.

If you pull your pan and look on the left, inside, area, around crank pins 2-3 there is a casting number that specifies year.
Rest of the info is very helpful

Thanks
Jeff

Are these the numbers that are being referred to?
Inside #, forward cylinders
inside #, center cylinders

inside #, aft cylinders

I have never paid much, if any, attention to these numbers. This block is a 1954 261 (could be a first series 1955), even though the external casting number, 3835911, indicates otherwise. The short block assembly was purchased in the early seventies, new from Chevrolet, and installed in a 1954 Corvette. The owner of the Corvette tired of the project, and the 261 was pulled out and I ended up as the owner. A few people have doubted this story, but it is true. The block is definitely a 261, with the siamesed cylinders.

Does anyone else have images of these inside casting numbers? Is there a consistent correlation of the numbers with the year of the block?

Hoyt

yes those are the ones I was told to look for when I ordered my rebuild kit.